job as of last month. utility has estimated 11,700 workers are necessary for decommissioning work this year. it said there would be no manpower shortage as it secured about 24,000 workers. this represents the total number of people who have worked at the crippled plant since the accident on march 11 last year. 16,000 workers have quit the job. many of them left due to severe working conditions. officials say that some workers will register again and there will be no employee shortage in the short term. they also admit they cannot predict how much workers they can secure and must train their work force. 3,000 people are working on the unprecedented project. japanese researchers have found something in a river bed from the time of dinosaurs.